GAMIC

import xarray as xr
from open_radar_data import DATASETS

import xradar as xd

Download

Fetching GAMIC radar data file from open-radar-data repository.

filename = DATASETS.fetch("DWD-Vol-2_99999_20180601054047_00.h5")

Downloading file 'DWD-Vol-2_99999_20180601054047_00.h5' from 'https://github.com/openradar/open-radar-data/raw/main/data/DWD-Vol-2_99999_20180601054047_00.h5' to '/home/docs/.cache/open-radar-data'.

xr.open_dataset

Making use of the xarray gamic backend. We also need to provide the group. Note, that we are using CfRadial2 group access pattern.

ds = xr.open_dataset(filename, group="sweep_9", engine="gamic")
display(ds)

<xarray.Dataset> Size: 17MB
Dimensions:            (azimuth: 360, range: 1000)
Coordinates:
  * azimuth            (azimuth) float64 3kB 0.5109 1.519 2.519 ... 358.5 359.5
    elevation          (azimuth) float64 3kB ...
    time               (azimuth) datetime64[ns] 3kB ...
  * range              (range) float32 4kB 75.0 225.0 ... 1.498e+05 1.499e+05
    longitude          float64 8B ...
    latitude           float64 8B ...
    altitude           float64 8B ...
Data variables: (12/18)
    DBZH               (azimuth, range) float32 1MB ...
    DBZV               (azimuth, range) float32 1MB ...
    KDP                (azimuth, range) float32 1MB ...
    RHOHV              (azimuth, range) float32 1MB ...
    DBTH               (azimuth, range) float32 1MB ...
    DBTV               (azimuth, range) float32 1MB ...
    ...                 ...
    sweep_mode         <U20 80B ...
    sweep_number       int64 8B ...
    prt_mode           <U7 28B ...
    follow_mode        <U7 28B ...
    sweep_fixed_angle  float64 8B ...
    nyquist_velocity   float64 8B ...
Attributes:
    source:         gamic
    ant_gain_h:     43
    ant_gain_v:     43
    noise_power_h:  -3.40133
    noise_power_v:  -3.13518
    rx_loss_h:      3
    rx_loss_v:      3

xarray.Dataset

• Dimensions:
  • azimuth: 360
  • range: 1000
• Coordinates: (7)
  • azimuth
    (azimuth)
    float64
    0.5109 1.519 2.519 ... 358.5 359.5

    standard_name :

    ray_azimuth_angle

    long_name :

    azimuth_angle_from_true_north

    units :

    degrees

    axis :

    radial_azimuth_coordinate

    array([  0.510864,   1.51886 ,   2.518616, ..., 357.511597, 358.511353,
           359.505615], shape=(360,))

  • elevation
    (azimuth)
    float64
    ...

    standard_name :

    ray_elevation_angle

    long_name :

    elevation_angle_from_horizontal_plane

    units :

    degrees

    axis :

    radial_elevation_coordinate

    [360 values with dtype=float64]

  • time
    (azimuth)
    datetime64[ns]
    ...

    standard_name :

    time

    [360 values with dtype=datetime64[ns]]

  • range
    (range)
    float32
    75.0 225.0 ... 1.498e+05 1.499e+05

    units :

    meters

    standard_name :

    projection_range_coordinate

    long_name :

    range_to_measurement_volume

    axis :

    radial_range_coordinate

    meters_between_gates :

    150.0

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    75.0

    array([7.50000e+01, 2.25000e+02, 3.75000e+02, ..., 1.49625e+05, 1.49775e+05,
           1.49925e+05], shape=(1000,), dtype=float32)

  • longitude
    ()
    float64
    ...

    long_name :

    longitude

    units :

    degrees_east

    standard_name :

    longitude

    [1 values with dtype=float64]

  • latitude
    ()
    float64
    ...

    long_name :

    latitude

    units :

    degrees_north

    positive :

    up

    standard_name :

    latitude

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    long_name :

    altitude

    units :

    meters

    standard_name :

    altitude

    [1 values with dtype=float64]

• Data variables: (18)
  • DBZH
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_h

    long_name :

    Equivalent reflectivity factor H

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • DBZV
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_v

    long_name :

    Equivalent reflectivity factor V

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • KDP
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    deg/km

    standard_name :

    radar_specific_differential_phase_hv

    long_name :

    Specific differential phase HV

    units :

    degrees per kilometer

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • RHOHV
    (azimuth, range)
    float32
    ...

    format :

    UV16

    is_dft :

    0

    standard_name :

    radar_correlation_coefficient_hv

    long_name :

    Correlation coefficient HV

    units :

    unitless

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • DBTH
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_h

    long_name :

    Total power H (uncorrected reflectivity)

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • DBTV
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_v

    long_name :

    Total power V (uncorrected reflectivity)

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • ZDR
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dB

    standard_name :

    radar_differential_reflectivity_hv

    long_name :

    Log differential reflectivity H/V

    units :

    dB

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • VRADH
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radial_velocity_of_scatterers_away_from_instrument_h

    long_name :

    Radial velocity of scatterers away from instrument H

    units :

    meters per seconds

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • VRADV
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radial_velocity_of_scatterers_away_from_instrument_v

    long_name :

    Radial velocity of scatterers away from instrument V

    units :

    meters per second

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • WRADH
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radar_doppler_spectrum_width_h

    long_name :

    Doppler spectrum width H

    units :

    meters per seconds

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • WRADV
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radar_doppler_spectrum_width_v

    long_name :

    Doppler spectrum width V

    units :

    meters per second

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • PHIDP
    (azimuth, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    deg

    standard_name :

    radar_differential_phase_hv

    long_name :

    Differential phase HV

    units :

    degrees

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • sweep_mode
    ()
    <U20
    ...

    [1 values with dtype=<U20]

  • sweep_number
    ()
    int64
    ...

    [1 values with dtype=int64]

  • prt_mode
    ()
    <U7
    ...

    [1 values with dtype=<U7]

  • follow_mode
    ()
    <U7
    ...

    [1 values with dtype=<U7]

  • sweep_fixed_angle
    ()
    float64
    ...

    [1 values with dtype=float64]

  • nyquist_velocity
    ()
    float64
    ...

    standard_name :

    nyquist_velocity

    units :

    m s-1

    [1 values with dtype=float64]

• Attributes: (7)

  source :

  gamic

  ant_gain_h :

  43

  ant_gain_v :

  43

  noise_power_h :

  -3.40133

  noise_power_v :

  -3.13518

  rx_loss_h :

  3

  rx_loss_v :

  3

Plot Time vs. Azimuth

ds.azimuth.plot()

[<matplotlib.lines.Line2D at 0x7f9096753250>]

Plot Range vs. Time

ds.DBZH.plot()

<matplotlib.collections.QuadMesh at 0x7f909663f0e0>

Plot Range vs. Azimuth

We need to sort by azimuth and specify the y-coordinate.

ds.DBZH.sortby("azimuth").plot(y="azimuth")

<matplotlib.collections.QuadMesh at 0x7f908e31efd0>

backend_kwargs

Beside first_dim there are several additional backend_kwargs for the odim backend, which handle different aspects of angle alignment. This comes into play, when azimuth and/or elevation arrays are not evenly spacend and other issues.

help(xd.io.GamicBackendEntrypoint)

Help on class GamicBackendEntrypoint in module xradar.io.backends.gamic:

class GamicBackendEntrypoint(xarray.backends.common.BackendEntrypoint)
 |  Xarray BackendEntrypoint for GAMIC data.
 |
 |  Keyword Arguments
 |  -----------------
 |  first_dim : str
 |      Can be ``time`` or ``auto`` first dimension. If set to ``auto``,
 |      first dimension will be either ``azimuth`` or ``elevation`` depending on
 |      type of sweep. Defaults to ``auto``.
 |  reindex_angle : bool or dict
 |      Defaults to False, no reindexing. Given dict should contain the kwargs to
 |      reindex_angle. Only invoked if `decode_coord=True`.
 |  fix_second_angle : bool
 |      For PPI only. If True, fixes erroneous second angle data. Defaults to ``False``.
 |  site_as_coords : bool
 |      Attach radar site-coordinates to Dataset, defaults to ``True``.
 |  kwargs : dict
 |      Additional kwargs are fed to :py:func:`xarray.open_dataset`.
 |
 |  Method resolution order:
 |      GamicBackendEntrypoint
 |      xarray.backends.common.BackendEntrypoint
 |      builtins.object
 |
 |  Methods defined here:
 |
 |  open_dataset(
 |      self,
 |      filename_or_obj,
 |      *,
 |      mask_and_scale=True,
 |      decode_times=True,
 |      concat_characters=True,
 |      decode_coords=True,
 |      drop_variables=None,
 |      use_cftime=None,
 |      decode_timedelta=None,
 |      format=None,
 |      group='sweep_0',
 |      invalid_netcdf=None,
 |      phony_dims='access',
 |      decode_vlen_strings=True,
 |      first_dim='auto',
 |      reindex_angle=False,
 |      fix_second_angle=False,
 |      site_as_coords=True
 |  )
 |      Backend open_dataset method used by Xarray in :py:func:`~xarray.open_dataset`.
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes defined here:
 |
 |  __annotations__ = {}
 |
 |  description = 'Open GAMIC HDF5 (.h5, .hdf5, .mvol) using h5netcdf in X...
 |
 |  open_dataset_parameters = ('filename_or_obj', 'mask_and_scale', 'decod...
 |
 |  url = 'https://xradar.rtfd.io/en/latest/io.html#gamic-hdf5'
 |
 |  ----------------------------------------------------------------------
 |  Methods inherited from xarray.backends.common.BackendEntrypoint:
 |
 |  __repr__(self) -> 'str'
 |      Return repr(self).
 |
 |  guess_can_open(self, filename_or_obj: 'T_PathFileOrDataStore') -> 'bool'
 |      Backend open_dataset method used by Xarray in :py:func:`~xarray.open_dataset`.
 |
 |  open_datatree(
 |      self,
 |      filename_or_obj: 'T_PathFileOrDataStore',
 |      *,
 |      drop_variables: 'str | Iterable[str] | None' = None
 |  ) -> 'DataTree'
 |      Backend open_datatree method used by Xarray in :py:func:`~xarray.open_datatree`.
 |
 |      If implemented, set the class variable supports_groups to True.
 |
 |  open_groups_as_dict(
 |      self,
 |      filename_or_obj: 'T_PathFileOrDataStore',
 |      *,
 |      drop_variables: 'str | Iterable[str] | None' = None
 |  ) -> 'dict[str, Dataset]'
 |      Opens a dictionary mapping from group names to Datasets.
 |
 |      Called by :py:func:`~xarray.open_groups`.
 |      This function exists to provide a universal way to open all groups in a file,
 |      before applying any additional consistency checks or requirements necessary
 |      to create a `DataTree` object (typically done using :py:meth:`~xarray.DataTree.from_dict`).
 |
 |      If implemented, set the class variable supports_groups to True.
 |
 |  ----------------------------------------------------------------------
 |  Data descriptors inherited from xarray.backends.common.BackendEntrypoint:
 |
 |  __dict__
 |      dictionary for instance variables
 |
 |  __weakref__
 |      list of weak references to the object
 |
 |  ----------------------------------------------------------------------
 |  Data and other attributes inherited from xarray.backends.common.BackendEntrypoint:
 |
 |  supports_groups = False

ds = xr.open_dataset(filename, group="sweep_9", engine="gamic", first_dim="time")
display(ds)

<xarray.Dataset> Size: 17MB
Dimensions:            (time: 360, range: 1000)
Coordinates:
  * time               (time) datetime64[ns] 3kB 2018-06-01T05:43:40.504000 ....
    elevation          (time) float64 3kB ...
    azimuth            (time) float64 3kB ...
  * range              (range) float32 4kB 75.0 225.0 ... 1.498e+05 1.499e+05
    longitude          float64 8B ...
    latitude           float64 8B ...
    altitude           float64 8B ...
Data variables: (12/18)
    DBZH               (time, range) float32 1MB ...
    DBZV               (time, range) float32 1MB ...
    KDP                (time, range) float32 1MB ...
    RHOHV              (time, range) float32 1MB ...
    DBTH               (time, range) float32 1MB ...
    DBTV               (time, range) float32 1MB ...
    ...                 ...
    sweep_mode         <U20 80B ...
    sweep_number       int64 8B ...
    prt_mode           <U7 28B ...
    follow_mode        <U7 28B ...
    sweep_fixed_angle  float64 8B ...
    nyquist_velocity   float64 8B ...
Attributes:
    source:         gamic
    ant_gain_h:     43
    ant_gain_v:     43
    noise_power_h:  -3.40133
    noise_power_v:  -3.13518
    rx_loss_h:      3
    rx_loss_v:      3

xarray.Dataset

• Dimensions:
  • time: 360
  • range: 1000
• Coordinates: (7)
  • time
    (time)
    datetime64[ns]
    2018-06-01T05:43:40.504000 ... 2...

    standard_name :

    time

    array(['2018-06-01T05:43:40.504000000', '2018-06-01T05:43:40.604000000',
           '2018-06-01T05:43:40.704000000', ..., '2018-06-01T05:44:16.205000000',
           '2018-06-01T05:44:16.305000000', '2018-06-01T05:44:16.405000000'],
          shape=(360,), dtype='datetime64[ns]')

  • elevation
    (time)
    float64
    ...

    standard_name :

    ray_elevation_angle

    long_name :

    elevation_angle_from_horizontal_plane

    units :

    degrees

    axis :

    radial_elevation_coordinate

    [360 values with dtype=float64]

  • azimuth
    (time)
    float64
    ...

    standard_name :

    ray_azimuth_angle

    long_name :

    azimuth_angle_from_true_north

    units :

    degrees

    axis :

    radial_azimuth_coordinate

    [360 values with dtype=float64]

  • range
    (range)
    float32
    75.0 225.0 ... 1.498e+05 1.499e+05

    units :

    meters

    standard_name :

    projection_range_coordinate

    long_name :

    range_to_measurement_volume

    axis :

    radial_range_coordinate

    meters_between_gates :

    150.0

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    75.0

    array([7.50000e+01, 2.25000e+02, 3.75000e+02, ..., 1.49625e+05, 1.49775e+05,
           1.49925e+05], shape=(1000,), dtype=float32)

  • longitude
    ()
    float64
    ...

    long_name :

    longitude

    units :

    degrees_east

    standard_name :

    longitude

    [1 values with dtype=float64]

  • latitude
    ()
    float64
    ...

    long_name :

    latitude

    units :

    degrees_north

    positive :

    up

    standard_name :

    latitude

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    long_name :

    altitude

    units :

    meters

    standard_name :

    altitude

    [1 values with dtype=float64]

• Data variables: (18)
  • DBZH
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_h

    long_name :

    Equivalent reflectivity factor H

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • DBZV
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_v

    long_name :

    Equivalent reflectivity factor V

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • KDP
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    deg/km

    standard_name :

    radar_specific_differential_phase_hv

    long_name :

    Specific differential phase HV

    units :

    degrees per kilometer

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • RHOHV
    (time, range)
    float32
    ...

    format :

    UV16

    is_dft :

    0

    standard_name :

    radar_correlation_coefficient_hv

    long_name :

    Correlation coefficient HV

    units :

    unitless

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • DBTH
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_h

    long_name :

    Total power H (uncorrected reflectivity)

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • DBTV
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dBZ

    standard_name :

    radar_equivalent_reflectivity_factor_v

    long_name :

    Total power V (uncorrected reflectivity)

    units :

    dBZ

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • ZDR
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    dB

    standard_name :

    radar_differential_reflectivity_hv

    long_name :

    Log differential reflectivity H/V

    units :

    dB

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • VRADH
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radial_velocity_of_scatterers_away_from_instrument_h

    long_name :

    Radial velocity of scatterers away from instrument H

    units :

    meters per seconds

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • VRADV
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radial_velocity_of_scatterers_away_from_instrument_v

    long_name :

    Radial velocity of scatterers away from instrument V

    units :

    meters per second

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • WRADH
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radar_doppler_spectrum_width_h

    long_name :

    Doppler spectrum width H

    units :

    meters per seconds

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • WRADV
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    m/s

    standard_name :

    radar_doppler_spectrum_width_v

    long_name :

    Doppler spectrum width V

    units :

    meters per second

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • PHIDP
    (time, range)
    float32
    ...

    format :

    UV8

    is_dft :

    0

    unit :

    deg

    standard_name :

    radar_differential_phase_hv

    long_name :

    Differential phase HV

    units :

    degrees

    _Undetect :

    0.0

    [360000 values with dtype=float32]

  • sweep_mode
    ()
    <U20
    ...

    [1 values with dtype=<U20]

  • sweep_number
    ()
    int64
    ...

    [1 values with dtype=int64]

  • prt_mode
    ()
    <U7
    ...

    [1 values with dtype=<U7]

  • follow_mode
    ()
    <U7
    ...

    [1 values with dtype=<U7]

  • sweep_fixed_angle
    ()
    float64
    ...

    [1 values with dtype=float64]

  • nyquist_velocity
    ()
    float64
    ...

    standard_name :

    nyquist_velocity

    units :

    m s-1

    [1 values with dtype=float64]

• Attributes: (7)

  source :

  gamic

  ant_gain_h :

  43

  ant_gain_v :

  43

  noise_power_h :

  -3.40133

  noise_power_v :

  -3.13518

  rx_loss_h :

  3

  rx_loss_v :

  3

open_odim_datatree

The same works analoguous with the datatree loader. But additionally we can provide a sweep string, number or list.

help(xd.io.open_gamic_datatree)

Help on function open_gamic_datatree in module xradar.io.backends.gamic:

open_gamic_datatree(filename_or_obj, **kwargs)
    Open GAMIC HDF5 dataset as :py:class:`xarray.DataTree`.

    Parameters
    ----------
    filename_or_obj : str, Path, file-like or DataStore
        Strings and Path objects are interpreted as a path to a local or remote
        radar file

    Keyword Arguments
    -----------------
    sweep : int, list of int, optional
        Sweep number(s) to extract, default to first sweep. If None, all sweeps are
        extracted into a list.
    first_dim : str
        Can be ``time`` or ``auto`` first dimension. If set to ``auto``,
        first dimension will be either ``azimuth`` or ``elevation`` depending on
        type of sweep. Defaults to ``auto``.
    reindex_angle : bool or dict
        Defaults to False, no reindexing. Given dict should contain the kwargs to
        reindex_angle. Only invoked if `decode_coord=True`.
    fix_second_angle : bool
        If True, fixes erroneous second angle data. Defaults to ``False``.
    site_as_coords : bool
        Attach radar site-coordinates to Dataset, defaults to ``True``.
    kwargs : dict
        Additional kwargs are fed to :py:func:`xarray.open_dataset`.

    Returns
    -------
    dtree: xarray.DataTree
        DataTree

dtree = xd.io.open_gamic_datatree(filename, sweep=8)
display(dtree)

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 1)
│   Coordinates:
│       latitude             float64 8B ...
│       longitude            float64 8B ...
│       altitude             float64 8B ...
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2018-06-01T05:43:08Z'
│       time_coverage_end    <U20 80B '2018-06-01T05:43:38Z'
│       sweep_group_name     (sweep) int64 8B 8
│       sweep_fixed_angle    (sweep) float64 8B 1.7
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          None
│       title:            None
│       institution:      None
│       references:       None
│       source:           gamic
│       history:          None
│       comment:          im/exported using xradar
└── Group: /sweep_0
        Dimensions:            (azimuth: 360, range: 1000)
        Coordinates:
          * azimuth            (azimuth) float64 3kB 0.5191 1.516 2.516 ... 358.5 359.5
            elevation          (azimuth) float64 3kB ...
            time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:43:17.69900...
          * range              (range) float32 4kB 75.0 225.0 ... 1.498e+05 1.499e+05
        Data variables: (12/18)
            DBZH               (azimuth, range) float32 1MB ...
            DBZV               (azimuth, range) float32 1MB ...
            KDP                (azimuth, range) float32 1MB ...
            RHOHV              (azimuth, range) float32 1MB ...
            DBTH               (azimuth, range) float32 1MB ...
            DBTV               (azimuth, range) float32 1MB ...
            ...                 ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...
            nyquist_velocity   float64 8B ...

xarray.DataTree

• /sweep_0(22)

  • Dimensions:
    • sweep: 1
    • azimuth: 360
    • range: 1000
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5191 1.516 2.516 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.519104,   1.516113,   2.515869, ..., 357.50885 , 358.505859,359.505615], shape=(360,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [360 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:43:17.699000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:43:17.699000000', '2018-06-01T05:43:17.782000000','2018-06-01T05:43:17.865000000', ..., '2018-06-01T05:43:17.449000000','2018-06-01T05:43:17.532000000', '2018-06-01T05:43:17.614000000'],shape=(360,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      75.0 225.0 ... 1.498e+05 1.499e+05

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      150.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      75.0

      array([7.50000e+01, 2.25000e+02, 3.75000e+02, ..., 1.49625e+05, 1.49775e+05,1.49925e+05], shape=(1000,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

• Dimensions:
  • sweep: 1
• Coordinates: (3)
  • latitude
    ()
    float64
    ...

    long_name :

    latitude

    units :

    degrees_north

    positive :

    up

    standard_name :

    latitude

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    long_name :

    longitude

    units :

    degrees_east

    standard_name :

    longitude

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    long_name :

    altitude

    units :

    meters

    standard_name :

    altitude

    [1 values with dtype=float64]

• Data variables: (7)
  • volume_number
    ()
    int64
    0

    array(0)

  • platform_type
    ()
    <U5
    'fixed'

    array('fixed', dtype='<U5')

  • instrument_type
    ()
    <U5
    'radar'

    array('radar', dtype='<U5')

  • time_coverage_start
    ()
    <U20
    '2018-06-01T05:43:08Z'

    array('2018-06-01T05:43:08Z', dtype='<U20')

  • time_coverage_end
    ()
    <U20
    '2018-06-01T05:43:38Z'

    array('2018-06-01T05:43:38Z', dtype='<U20')

  • sweep_group_name
    (sweep)
    int64
    8

    array([8])

  • sweep_fixed_angle
    (sweep)
    float64
    1.7

    array([1.7])

• Attributes: (9)

  Conventions :

  None

  instrument_name :

  None

  version :

  None

  title :

  None

  institution :

  None

  references :

  None

  source :

  gamic

  history :

  None

  comment :

  im/exported using xradar

Plot Sweep Range vs. Time

dtree["sweep_0"].ds.DBZH.sortby("time").plot(y="time")

<matplotlib.collections.QuadMesh at 0x7f908e248690>

Plot Sweep Range vs. Azimuth

dtree["sweep_0"].ds.DBZH.plot()

<matplotlib.collections.QuadMesh at 0x7f908e2d7c50>

dtree = xd.io.open_gamic_datatree(filename, sweep="sweep_8")
display(dtree)

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 1)
│   Coordinates:
│       latitude             float64 8B ...
│       longitude            float64 8B ...
│       altitude             float64 8B ...
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2018-06-01T05:43:08Z'
│       time_coverage_end    <U20 80B '2018-06-01T05:43:38Z'
│       sweep_group_name     (sweep) int64 8B 8
│       sweep_fixed_angle    (sweep) float64 8B 1.7
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          None
│       title:            None
│       institution:      None
│       references:       None
│       source:           gamic
│       history:          None
│       comment:          im/exported using xradar
└── Group: /sweep_0
        Dimensions:            (azimuth: 360, range: 1000)
        Coordinates:
          * azimuth            (azimuth) float64 3kB 0.5191 1.516 2.516 ... 358.5 359.5
            elevation          (azimuth) float64 3kB ...
            time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:43:17.69900...
          * range              (range) float32 4kB 75.0 225.0 ... 1.498e+05 1.499e+05
        Data variables: (12/18)
            DBZH               (azimuth, range) float32 1MB ...
            DBZV               (azimuth, range) float32 1MB ...
            KDP                (azimuth, range) float32 1MB ...
            RHOHV              (azimuth, range) float32 1MB ...
            DBTH               (azimuth, range) float32 1MB ...
            DBTV               (azimuth, range) float32 1MB ...
            ...                 ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...
            nyquist_velocity   float64 8B ...

xarray.DataTree

• /sweep_0(22)

  • Dimensions:
    • sweep: 1
    • azimuth: 360
    • range: 1000
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5191 1.516 2.516 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.519104,   1.516113,   2.515869, ..., 357.50885 , 358.505859,359.505615], shape=(360,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [360 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:43:17.699000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:43:17.699000000', '2018-06-01T05:43:17.782000000','2018-06-01T05:43:17.865000000', ..., '2018-06-01T05:43:17.449000000','2018-06-01T05:43:17.532000000', '2018-06-01T05:43:17.614000000'],shape=(360,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      75.0 225.0 ... 1.498e+05 1.499e+05

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      150.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      75.0

      array([7.50000e+01, 2.25000e+02, 3.75000e+02, ..., 1.49625e+05, 1.49775e+05,1.49925e+05], shape=(1000,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

• Dimensions:
  • sweep: 1
• Coordinates: (3)
  • latitude
    ()
    float64
    ...

    long_name :

    latitude

    units :

    degrees_north

    positive :

    up

    standard_name :

    latitude

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    long_name :

    longitude

    units :

    degrees_east

    standard_name :

    longitude

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    long_name :

    altitude

    units :

    meters

    standard_name :

    altitude

    [1 values with dtype=float64]

• Data variables: (7)
  • volume_number
    ()
    int64
    0

    array(0)

  • platform_type
    ()
    <U5
    'fixed'

    array('fixed', dtype='<U5')

  • instrument_type
    ()
    <U5
    'radar'

    array('radar', dtype='<U5')

  • time_coverage_start
    ()
    <U20
    '2018-06-01T05:43:08Z'

    array('2018-06-01T05:43:08Z', dtype='<U20')

  • time_coverage_end
    ()
    <U20
    '2018-06-01T05:43:38Z'

    array('2018-06-01T05:43:38Z', dtype='<U20')

  • sweep_group_name
    (sweep)
    int64
    8

    array([8])

  • sweep_fixed_angle
    (sweep)
    float64
    1.7

    array([1.7])

• Attributes: (9)

  Conventions :

  None

  instrument_name :

  None

  version :

  None

  title :

  None

  institution :

  None

  references :

  None

  source :

  gamic

  history :

  None

  comment :

  im/exported using xradar

dtree = xd.io.open_gamic_datatree(filename, sweep=[0, 1, 8])
display(dtree)

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 3)
│   Coordinates:
│       latitude             float64 8B ...
│       longitude            float64 8B ...
│       altitude             float64 8B ...
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2018-06-01T05:40:47Z'
│       time_coverage_end    <U20 80B '2018-06-01T05:43:38Z'
│       sweep_group_name     (sweep) int64 24B 0 1 8
│       sweep_fixed_angle    (sweep) float64 24B 28.0 18.0 1.7
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          None
│       title:            None
│       institution:      None
│       references:       None
│       source:           gamic
│       history:          None
│       comment:          im/exported using xradar
├── Group: /sweep_0
│       Dimensions:            (azimuth: 361, range: 360)
│       Coordinates:
│         * azimuth            (azimuth) float64 3kB 0.5219 1.519 2.53 ... 358.5 359.5
│           elevation          (azimuth) float64 3kB ...
│           time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:40:57.36300...
│         * range              (range) float32 1kB 50.0 150.0 ... 3.585e+04 3.595e+04
│       Data variables: (12/18)
│           DBZH               (azimuth, range) float32 520kB ...
│           DBZV               (azimuth, range) float32 520kB ...
│           KDP                (azimuth, range) float32 520kB ...
│           RHOHV              (azimuth, range) float32 520kB ...
│           DBTH               (azimuth, range) float32 520kB ...
│           DBTV               (azimuth, range) float32 520kB ...
│           ...                 ...
│           sweep_mode         <U20 80B ...
│           sweep_number       int64 8B ...
│           prt_mode           <U7 28B ...
│           follow_mode        <U7 28B ...
│           sweep_fixed_angle  float64 8B ...
│           nyquist_velocity   float64 8B ...
├── Group: /sweep_1
│       Dimensions:            (azimuth: 361, range: 500)
│       Coordinates:
│         * azimuth            (azimuth) float64 3kB 0.5246 1.533 2.543 ... 358.5 359.5
│           elevation          (azimuth) float64 3kB ...
│           time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:41:10.99700...
│         * range              (range) float32 2kB 50.0 150.0 ... 4.985e+04 4.995e+04
│       Data variables: (12/18)
│           DBZH               (azimuth, range) float32 722kB ...
│           DBZV               (azimuth, range) float32 722kB ...
│           KDP                (azimuth, range) float32 722kB ...
│           RHOHV              (azimuth, range) float32 722kB ...
│           DBTH               (azimuth, range) float32 722kB ...
│           DBTV               (azimuth, range) float32 722kB ...
│           ...                 ...
│           sweep_mode         <U20 80B ...
│           sweep_number       int64 8B ...
│           prt_mode           <U7 28B ...
│           follow_mode        <U7 28B ...
│           sweep_fixed_angle  float64 8B ...
│           nyquist_velocity   float64 8B ...
└── Group: /sweep_2
        Dimensions:            (azimuth: 360, range: 1000)
        Coordinates:
          * azimuth            (azimuth) float64 3kB 0.5191 1.516 2.516 ... 358.5 359.5
            elevation          (azimuth) float64 3kB ...
            time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:43:17.69900...
          * range              (range) float32 4kB 75.0 225.0 ... 1.498e+05 1.499e+05
        Data variables: (12/18)
            DBZH               (azimuth, range) float32 1MB ...
            DBZV               (azimuth, range) float32 1MB ...
            KDP                (azimuth, range) float32 1MB ...
            RHOHV              (azimuth, range) float32 1MB ...
            DBTH               (azimuth, range) float32 1MB ...
            DBTV               (azimuth, range) float32 1MB ...
            ...                 ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...
            nyquist_velocity   float64 8B ...

xarray.DataTree

• /sweep_0(22)

  • Dimensions:
    • sweep: 3
    • azimuth: 361
    • range: 360
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5219 1.519 2.53 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.521851,   1.51886 ,   2.529602, ..., 357.51709 , 358.522339,359.516602], shape=(361,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [361 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:40:57.363000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:40:57.363000000', '2018-06-01T05:40:57.399000000','2018-06-01T05:40:57.435000000', ..., '2018-06-01T05:40:57.256000000','2018-06-01T05:40:57.292000000', '2018-06-01T05:40:57.327000000'],shape=(361,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      50.0 150.0 ... 3.585e+04 3.595e+04

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      100.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      50.0

      array([   50.,   150.,   250., ..., 35750., 35850., 35950.],shape=(360,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [129960 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

  /sweep_1(22)

  • Dimensions:
    • sweep: 3
    • azimuth: 361
    • range: 500
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5246 1.533 2.543 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.524597,   1.532593,   2.543335, ..., 357.52533 , 358.522339,359.519348], shape=(361,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [361 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:41:10.997000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:41:10.997000000', '2018-06-01T05:41:11.035000000','2018-06-01T05:41:11.074000000', ..., '2018-06-01T05:41:10.881000000','2018-06-01T05:41:10.920000000', '2018-06-01T05:41:10.958000000'],shape=(361,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      50.0 150.0 ... 4.985e+04 4.995e+04

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      100.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      50.0

      array([   50.,   150.,   250., ..., 49750., 49850., 49950.],shape=(500,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

  /sweep_2(22)

  • Dimensions:
    • sweep: 3
    • azimuth: 360
    • range: 1000
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5191 1.516 2.516 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.519104,   1.516113,   2.515869, ..., 357.50885 , 358.505859,359.505615], shape=(360,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [360 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:43:17.699000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:43:17.699000000', '2018-06-01T05:43:17.782000000','2018-06-01T05:43:17.865000000', ..., '2018-06-01T05:43:17.449000000','2018-06-01T05:43:17.532000000', '2018-06-01T05:43:17.614000000'],shape=(360,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      75.0 225.0 ... 1.498e+05 1.499e+05

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      150.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      75.0

      array([7.50000e+01, 2.25000e+02, 3.75000e+02, ..., 1.49625e+05, 1.49775e+05,1.49925e+05], shape=(1000,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

• Dimensions:
  • sweep: 3
• Coordinates: (3)
  • latitude
    ()
    float64
    ...

    long_name :

    latitude

    units :

    degrees_north

    positive :

    up

    standard_name :

    latitude

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    long_name :

    longitude

    units :

    degrees_east

    standard_name :

    longitude

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    long_name :

    altitude

    units :

    meters

    standard_name :

    altitude

    [1 values with dtype=float64]

• Data variables: (7)
  • volume_number
    ()
    int64
    0

    array(0)

  • platform_type
    ()
    <U5
    'fixed'

    array('fixed', dtype='<U5')

  • instrument_type
    ()
    <U5
    'radar'

    array('radar', dtype='<U5')

  • time_coverage_start
    ()
    <U20
    '2018-06-01T05:40:47Z'

    array('2018-06-01T05:40:47Z', dtype='<U20')

  • time_coverage_end
    ()
    <U20
    '2018-06-01T05:43:38Z'

    array('2018-06-01T05:43:38Z', dtype='<U20')

  • sweep_group_name
    (sweep)
    int64
    0 1 8

    array([0, 1, 8])

  • sweep_fixed_angle
    (sweep)
    float64
    28.0 18.0 1.7

    array([28. , 18. ,  1.7])

• Attributes: (9)

  Conventions :

  None

  instrument_name :

  None

  version :

  None

  title :

  None

  institution :

  None

  references :

  None

  source :

  gamic

  history :

  None

  comment :

  im/exported using xradar

dtree = xd.io.open_gamic_datatree(filename, sweep=["sweep_1", "sweep_2", "sweep_8"])
display(dtree)

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 3)
│   Coordinates:
│       latitude             float64 8B ...
│       longitude            float64 8B ...
│       altitude             float64 8B ...
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2018-06-01T05:41:01Z'
│       time_coverage_end    <U20 80B '2018-06-01T05:43:38Z'
│       sweep_group_name     (sweep) int64 24B 1 2 8
│       sweep_fixed_angle    (sweep) float64 24B 18.0 14.0 1.7
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          None
│       title:            None
│       institution:      None
│       references:       None
│       source:           gamic
│       history:          None
│       comment:          im/exported using xradar
├── Group: /sweep_0
│       Dimensions:            (azimuth: 361, range: 500)
│       Coordinates:
│         * azimuth            (azimuth) float64 3kB 0.5246 1.533 2.543 ... 358.5 359.5
│           elevation          (azimuth) float64 3kB ...
│           time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:41:10.99700...
│         * range              (range) float32 2kB 50.0 150.0 ... 4.985e+04 4.995e+04
│       Data variables: (12/18)
│           DBZH               (azimuth, range) float32 722kB ...
│           DBZV               (azimuth, range) float32 722kB ...
│           KDP                (azimuth, range) float32 722kB ...
│           RHOHV              (azimuth, range) float32 722kB ...
│           DBTH               (azimuth, range) float32 722kB ...
│           DBTV               (azimuth, range) float32 722kB ...
│           ...                 ...
│           sweep_mode         <U20 80B ...
│           sweep_number       int64 8B ...
│           prt_mode           <U7 28B ...
│           follow_mode        <U7 28B ...
│           sweep_fixed_angle  float64 8B ...
│           nyquist_velocity   float64 8B ...
├── Group: /sweep_1
│       Dimensions:            (azimuth: 361, range: 620)
│       Coordinates:
│         * azimuth            (azimuth) float64 3kB 0.5191 1.524 2.527 ... 358.5 359.5
│           elevation          (azimuth) float64 3kB ...
│           time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:41:24.84300...
│         * range              (range) float32 2kB 50.0 150.0 ... 6.185e+04 6.195e+04
│       Data variables: (12/18)
│           DBZH               (azimuth, range) float32 895kB ...
│           DBZV               (azimuth, range) float32 895kB ...
│           KDP                (azimuth, range) float32 895kB ...
│           RHOHV              (azimuth, range) float32 895kB ...
│           DBTH               (azimuth, range) float32 895kB ...
│           DBTV               (azimuth, range) float32 895kB ...
│           ...                 ...
│           sweep_mode         <U20 80B ...
│           sweep_number       int64 8B ...
│           prt_mode           <U7 28B ...
│           follow_mode        <U7 28B ...
│           sweep_fixed_angle  float64 8B ...
│           nyquist_velocity   float64 8B ...
└── Group: /sweep_2
        Dimensions:            (azimuth: 360, range: 1000)
        Coordinates:
          * azimuth            (azimuth) float64 3kB 0.5191 1.516 2.516 ... 358.5 359.5
            elevation          (azimuth) float64 3kB ...
            time               (azimuth) datetime64[ns] 3kB 2018-06-01T05:43:17.69900...
          * range              (range) float32 4kB 75.0 225.0 ... 1.498e+05 1.499e+05
        Data variables: (12/18)
            DBZH               (azimuth, range) float32 1MB ...
            DBZV               (azimuth, range) float32 1MB ...
            KDP                (azimuth, range) float32 1MB ...
            RHOHV              (azimuth, range) float32 1MB ...
            DBTH               (azimuth, range) float32 1MB ...
            DBTV               (azimuth, range) float32 1MB ...
            ...                 ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...
            nyquist_velocity   float64 8B ...

xarray.DataTree

• /sweep_0(22)

  • Dimensions:
    • sweep: 3
    • azimuth: 361
    • range: 500
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5246 1.533 2.543 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.524597,   1.532593,   2.543335, ..., 357.52533 , 358.522339,359.519348], shape=(361,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [361 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:41:10.997000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:41:10.997000000', '2018-06-01T05:41:11.035000000','2018-06-01T05:41:11.074000000', ..., '2018-06-01T05:41:10.881000000','2018-06-01T05:41:10.920000000', '2018-06-01T05:41:10.958000000'],shape=(361,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      50.0 150.0 ... 4.985e+04 4.995e+04

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      100.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      50.0

      array([   50.,   150.,   250., ..., 49750., 49850., 49950.],shape=(500,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [180500 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

  /sweep_1(22)

  • Dimensions:
    • sweep: 3
    • azimuth: 361
    • range: 620
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5191 1.524 2.527 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.519104,   1.524353,   2.526855, ..., 357.536316, 358.530579,359.519348], shape=(361,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [361 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:41:24.843000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:41:24.843000000', '2018-06-01T05:41:24.881000000','2018-06-01T05:41:24.921000000', ..., '2018-06-01T05:41:24.728000000','2018-06-01T05:41:24.767000000', '2018-06-01T05:41:24.805000000'],shape=(361,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      50.0 150.0 ... 6.185e+04 6.195e+04

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      100.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      50.0

      array([5.000e+01, 1.500e+02, 2.500e+02, ..., 6.175e+04, 6.185e+04, 6.195e+04],shape=(620,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [223820 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

  /sweep_2(22)

  • Dimensions:
    • sweep: 3
    • azimuth: 360
    • range: 1000
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float64
      0.5191 1.516 2.516 ... 358.5 359.5

      standard_name :

      ray_azimuth_angle

      long_name :

      azimuth_angle_from_true_north

      units :

      degrees

      axis :

      radial_azimuth_coordinate

      array([  0.519104,   1.516113,   2.515869, ..., 357.50885 , 358.505859,359.505615], shape=(360,))

    • elevation
      (azimuth)
      float64
      ...

      standard_name :

      ray_elevation_angle

      long_name :

      elevation_angle_from_horizontal_plane

      units :

      degrees

      axis :

      radial_elevation_coordinate

      [360 values with dtype=float64]

    • time
      (azimuth)
      datetime64[ns]
      2018-06-01T05:43:17.699000 ... 2...

      standard_name :

      time

      array(['2018-06-01T05:43:17.699000000', '2018-06-01T05:43:17.782000000','2018-06-01T05:43:17.865000000', ..., '2018-06-01T05:43:17.449000000','2018-06-01T05:43:17.532000000', '2018-06-01T05:43:17.614000000'],shape=(360,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      75.0 225.0 ... 1.498e+05 1.499e+05

      units :

      meters

      standard_name :

      projection_range_coordinate

      long_name :

      range_to_measurement_volume

      axis :

      radial_range_coordinate

      meters_between_gates :

      150.0

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      75.0

      array([7.50000e+01, 2.25000e+02, 3.75000e+02, ..., 1.49625e+05, 1.49775e+05,1.49925e+05], shape=(1000,), dtype=float32)

  • Data variables: (18)
    • DBZH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Equivalent reflectivity factor H

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBZV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Equivalent reflectivity factor V

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • KDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg/km

      standard_name :

      radar_specific_differential_phase_hv

      long_name :

      Specific differential phase HV

      units :

      degrees per kilometer

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • RHOHV
      (azimuth, range)
      float32
      ...

      format :

      UV16

      is_dft :

      0

      standard_name :

      radar_correlation_coefficient_hv

      long_name :

      Correlation coefficient HV

      units :

      unitless

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_h

      long_name :

      Total power H (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • DBTV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dBZ

      standard_name :

      radar_equivalent_reflectivity_factor_v

      long_name :

      Total power V (uncorrected reflectivity)

      units :

      dBZ

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • ZDR
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      dB

      standard_name :

      radar_differential_reflectivity_hv

      long_name :

      Log differential reflectivity H/V

      units :

      dB

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_h

      long_name :

      Radial velocity of scatterers away from instrument H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • VRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument_v

      long_name :

      Radial velocity of scatterers away from instrument V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADH
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_h

      long_name :

      Doppler spectrum width H

      units :

      meters per seconds

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • WRADV
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      m/s

      standard_name :

      radar_doppler_spectrum_width_v

      long_name :

      Doppler spectrum width V

      units :

      meters per second

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • PHIDP
      (azimuth, range)
      float32
      ...

      format :

      UV8

      is_dft :

      0

      unit :

      deg

      standard_name :

      radar_differential_phase_hv

      long_name :

      Differential phase HV

      units :

      degrees

      _Undetect :

      0.0

      [360000 values with dtype=float32]

    • sweep_mode
      ()
      <U20
      ...

      [1 values with dtype=<U20]

    • sweep_number
      ()
      int64
      ...

      [1 values with dtype=int64]

    • prt_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • follow_mode
      ()
      <U7
      ...

      [1 values with dtype=<U7]

    • sweep_fixed_angle
      ()
      float64
      ...

      [1 values with dtype=float64]

    • nyquist_velocity
      ()
      float64
      ...

      standard_name :

      nyquist_velocity

      units :

      m s-1

      [1 values with dtype=float64]

• Dimensions:
  • sweep: 3
• Coordinates: (3)
  • latitude
    ()
    float64
    ...

    long_name :

    latitude

    units :

    degrees_north

    positive :

    up

    standard_name :

    latitude

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    long_name :

    longitude

    units :

    degrees_east

    standard_name :

    longitude

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    long_name :

    altitude

    units :

    meters

    standard_name :

    altitude

    [1 values with dtype=float64]

• Data variables: (7)
  • volume_number
    ()
    int64
    0

    array(0)

  • platform_type
    ()
    <U5
    'fixed'

    array('fixed', dtype='<U5')

  • instrument_type
    ()
    <U5
    'radar'

    array('radar', dtype='<U5')

  • time_coverage_start
    ()
    <U20
    '2018-06-01T05:41:01Z'

    array('2018-06-01T05:41:01Z', dtype='<U20')

  • time_coverage_end
    ()
    <U20
    '2018-06-01T05:43:38Z'

    array('2018-06-01T05:43:38Z', dtype='<U20')

  • sweep_group_name
    (sweep)
    int64
    1 2 8

    array([1, 2, 8])

  • sweep_fixed_angle
    (sweep)
    float64
    18.0 14.0 1.7

    array([18. , 14. ,  1.7])

• Attributes: (9)

  Conventions :

  None

  instrument_name :

  None

  version :

  None

  title :

  None

  institution :

  None

  references :

  None

  source :

  gamic

  history :

  None

  comment :

  im/exported using xradar